src/gtk/radiobut.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/radiobut.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #if wxUSE_RADIOBTN
  14
  15 #include "wx/radiobut.h"
  16
  17 #include <gtk/gtk.h>
  18 #include "wx/gtk/private.h"
  19 #include "wx/gtk/private/gtk2-compat.h"
  20
  21 //-----------------------------------------------------------------------------
  22 // data
  23 //-----------------------------------------------------------------------------
  24
  25 extern bool           g_blockEventsOnDrag;
  26
  27 //-----------------------------------------------------------------------------
  28 // "clicked"
  29 //-----------------------------------------------------------------------------
  30
  31 extern "C" {
  32 static
  33 void gtk_radiobutton_clicked_callback( GtkToggleButton *button, wxRadioButton *rb )
  34 {
  35     if (!rb->m_hasVMT) return;
  36
  37     if (g_blockEventsOnDrag) return;
  38
  39     if (!gtk_toggle_button_get_active(button)) return;
  40
  41     wxCommandEvent event( wxEVT_COMMAND_RADIOBUTTON_SELECTED, rb->GetId());
  42     event.SetInt( rb->GetValue() );
  43     event.SetEventObject( rb );
  44     rb->HandleWindowEvent( event );
  45 }
  46 }
  47
  48 //-----------------------------------------------------------------------------
  49 // wxRadioButton
  50 //-----------------------------------------------------------------------------
  51
  52 bool wxRadioButton::Create( wxWindow *parent,
  53                             wxWindowID id,
  54                             const wxString& label,
  55                             const wxPoint& pos,
  56                             const wxSize& size,
  57                             long style,
  58                             const wxValidator& validator,
  59                             const wxString& name )
  60 {
  61     if (!PreCreation( parent, pos, size ) ||
  62         !CreateBase( parent, id, pos, size, style, validator, name ))
  63     {
  64         wxFAIL_MSG( wxT("wxRadioButton creation failed") );
  65         return false;
  66     }
  67
  68     // Check if this radio button should be put into an existing group. This
  69     // shouldn't be done if it's given a style to explicitly start a new group
  70     // or if it's not meant to be a part of a group at all.
  71     GSList* radioButtonGroup = NULL;
  72     if (!HasFlag(wxRB_GROUP) && !HasFlag(wxRB_SINGLE))
  73     {
  74         // search backward for last group start
  75         wxWindowList::compatibility_iterator node = parent->GetChildren().GetLast();
  76         for (; node; node = node->GetPrevious())
  77         {
  78             wxWindow *child = node->GetData();
  79
  80             // We stop at the first previous radio button in any case as it
  81             // wouldn't make sense to put this button in a group with another
  82             // one if there is a radio button that is not part of the same
  83             // group between them.
  84             if (wxIsKindOf(child, wxRadioButton))
  85             {
  86                 // Any preceding radio button can be used to get its group, not
  87                 // necessarily one with wxRB_GROUP style, but exclude
  88                 // wxRB_SINGLE ones as their group should never be shared.
  89                 if (!child->HasFlag(wxRB_SINGLE))
  90                 {
  91                     radioButtonGroup = gtk_radio_button_get_group(
  92                         GTK_RADIO_BUTTON(child->m_widget));
  93                 }
  94
  95                 break;
  96             }
  97         }
  98     }
  99
 100     m_widget = gtk_radio_button_new_with_label( radioButtonGroup, wxGTK_CONV( label ) );
 101     g_object_ref(m_widget);
 102
 103     SetLabel(label);
 104
 105     g_signal_connect_after (m_widget, "clicked",
 106                             G_CALLBACK (gtk_radiobutton_clicked_callback), this);
 107
 108     m_parent->DoAddChild( this );
 109
 110     PostCreation(size);
 111
 112     return true;
 113 }
 114
 115 void wxRadioButton::SetLabel( const wxString& label )
 116 {
 117     wxCHECK_RET( m_widget != NULL, wxT("invalid radiobutton") );
 118
 119     // save the original label
 120     wxControlBase::SetLabel(label);
 121
 122     GTKSetLabelForLabel(GTK_LABEL(gtk_bin_get_child(GTK_BIN(m_widget))), label);
 123 }
 124
 125 void wxRadioButton::SetValue( bool val )
 126 {
 127     wxCHECK_RET( m_widget != NULL, wxT("invalid radiobutton") );
 128
 129     if (val == GetValue())
 130         return;
 131
 132     g_signal_handlers_block_by_func(
 133         m_widget, (void*)gtk_radiobutton_clicked_callback, this);
 134
 135     if (val)
 136     {
 137         gtk_toggle_button_set_active( GTK_TOGGLE_BUTTON(m_widget), TRUE );
 138     }
 139     else
 140     {
 141         // should give an assert
 142         // RL - No it shouldn't.  A wxGenericValidator might try to set it
 143         //      as FALSE.  Failing silently is probably TRTTD here.
 144     }
 145
 146     g_signal_handlers_unblock_by_func(
 147         m_widget, (void*)gtk_radiobutton_clicked_callback, this);
 148 }
 149
 150 bool wxRadioButton::GetValue() const
 151 {
 152     wxCHECK_MSG( m_widget != NULL, false, wxT("invalid radiobutton") );
 153
 154     return gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(m_widget)) != 0;
 155 }
 156
 157 bool wxRadioButton::Enable( bool enable )
 158 {
 159     if (!base_type::Enable(enable))
 160         return false;
 161
 162     gtk_widget_set_sensitive(gtk_bin_get_child(GTK_BIN(m_widget)), enable);
 163
 164     if (enable)
 165         GTKFixSensitivity();
 166
 167     return true;
 168 }
 169
 170 void wxRadioButton::DoApplyWidgetStyle(GtkRcStyle *style)
 171 {
 172     GTKApplyStyle(m_widget, style);
 173     GTKApplyStyle(gtk_bin_get_child(GTK_BIN(m_widget)), style);
 174 }
 175
 176 GdkWindow *
 177 wxRadioButton::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
 178 {
 179     return gtk_button_get_event_window(GTK_BUTTON(m_widget));
 180 }
 181
 182 // static
 183 wxVisualAttributes
 184 wxRadioButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 185 {
 186     wxVisualAttributes attr;
 187     // NB: we need toplevel window so that GTK+ can find the right style
 188     GtkWidget *wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 189     GtkWidget* widget = gtk_radio_button_new_with_label(NULL, "");
 190     gtk_container_add(GTK_CONTAINER(wnd), widget);
 191     attr = GetDefaultAttributesFromGTKWidget(widget);
 192     gtk_widget_destroy(wnd);
 193     return attr;
 194 }
 195
 196
 197 #endif